CN108598519A - A kind of bipolar plates and preparation method thereof - Google Patents
A kind of bipolar plates and preparation method thereof Download PDFInfo
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- CN108598519A CN108598519A CN201810478674.0A CN201810478674A CN108598519A CN 108598519 A CN108598519 A CN 108598519A CN 201810478674 A CN201810478674 A CN 201810478674A CN 108598519 A CN108598519 A CN 108598519A
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- carbon felt
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 184
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 95
- 239000010439 graphite Substances 0.000 claims abstract description 95
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 89
- 229920005989 resin Polymers 0.000 claims abstract description 64
- 239000011347 resin Substances 0.000 claims abstract description 64
- 229920002521 macromolecule Polymers 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000005470 impregnation Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 238000004382 potting Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000012459 cleaning agent Substances 0.000 claims abstract description 5
- 230000010355 oscillation Effects 0.000 claims abstract description 3
- 238000000746 purification Methods 0.000 claims abstract description 3
- 238000012545 processing Methods 0.000 claims description 14
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- 238000005087 graphitization Methods 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002033 PVDF binder Substances 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- 229960001760 dimethyl sulfoxide Drugs 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 229920006350 polyacrylonitrile resin Polymers 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000002000 scavenging effect Effects 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims 1
- 238000009738 saturating Methods 0.000 claims 1
- 238000009987 spinning Methods 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 238000005452 bending Methods 0.000 description 8
- 238000010041 electrostatic spinning Methods 0.000 description 8
- 230000035699 permeability Effects 0.000 description 8
- 239000003575 carbonaceous material Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- 239000003738 black carbon Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0213—Gas-impermeable carbon-containing materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0226—Composites in the form of mixtures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a kind of bipolar plates and preparation method thereof, the bipolar plates include graphite carbon felt, and it is filled in the macromolecule resin of the graphite carbon felt, the mass content of graphite carbon felt described in the bipolar plates is 40%~90%, and the mass ratio of the resin material is 10%~60%；Include the following steps：Graphite carbon felt pre-processes, and graphite carbon felt is immersed to ultrasonic oscillation in cleaning agent and deionized water successively and is cleaned, drying for standby is taken out；Macromolecule resin is melted or to be dissolved into macromolecule resin liquid spare；The graphite carbon felt of purification is completely immersed in the resin liquid of step (2), the impregnation under room temperature, normal pressure, then takes out the drying of impregnated graphite carbon felt；Finally, the graphite carbon felt of potting resin is placed in mold and is suppressed up to the bipolar plates.The bipolar plates of the present invention have been also equipped with good mechanical strength, corrosion resistance, air-tightness and economy while meeting good electric conductivity, are with a wide range of applications in pile preparation.
Description
Technical field
The present invention relates to pile manufacturing fields more particularly to a kind of bipolar plates and preparation method thereof.
Background technology
The bipolar plates for being presently used for fuel cell and flow battery are mainly graphite bi-polar plate and metal double polar plates.Graphite
The corrosion resisting property of bipolar plates is best, but of high cost, accounts for about 50%~60%, becomes the bottleneck of limitation fuel further genralrlization.And
The corrosion resistance of metal material bipolar plates is one and is difficult to thoroughly solve the problems, such as, the acid or alkalinity of electrolyte exacerbate bipolar plates
Chemical attack or electrochemical corrosion speed, the metal ion of dissolving are further degrading the electrode reaction of battery, even result in whole
A cell reaction is stagnated, and battery is scrapped.In recent years, Plastic conductive bipolar plates are developed, that is, pass through conductive filler and high score
The mixing of subtree fat, hot pressing, form the plastic plate with good strength and toughness, but the electric conductivity of such bipolar plates is relatively low, phase
For graphite bi-polar plate or metal double polar plates order of magnitude lower or so, it need to be improved.Moreover, the preparation of plastic bipolar plate is former
Material and technique cause to generate irreconcilable contradiction between its mechanicalness and electric conductivity, cause to be difficult to prepare excellent combination property
Plastic conductive bipolar plates.
Invention content
In view of this, the present invention provides a kind of bipolar plates and preparation method thereof, meeting the same of good electric conductivity
When, it is also equipped with good mechanical strength, corrosion resistance, air-tightness and economy, before being had a wide range of applications in pile preparation
Scape.
The technological means that the present invention uses is as follows：
A kind of bipolar plates, the bipolar plates include the graphite carbon felt for having three-dimensional net structure, and are filled in the stone
Macromolecule resin in black carbon felt three-dimensional net structure, the mass content of graphite carbon felt described in the bipolar plates be 40%~
90%, the mass ratio of the resin material is 10%~60%.Wherein as the stone with three-dimensional net structure of conducting matrix grain
Uniform distribution is presented in plane and two, section dimension in black carbon felt, and the conductive network in plane and section interconnects, and
The macromolecule resin filled in the various pieces conductive network presentation consistency of bipolar plates, three-dimensional net structure wherein,
So that graphite carbon felt flexible has good mechanicalness, air-tightness and corrosion resistance originally, made by the way of filling
The three-dimensional net structure of graphite carbon felt is not destroyed, and ensure that the good electric conductivity of graphite carbon felt.
Preferably, the graphite carbon felt porosity is 60%~95%, and pore diameter range is 30 μm~3000 μm, graphite carbon felt
Middle carbon content is 80% or more, and graphite carbon felt fibre diameter is 10 μm~200 μm.To ensure the three-dimensional net structure of graphite carbon felt
Macromolecule resin can be fully inserted, pore size, fibre diameter needs meet some requirements, and the present invention uses aperture model
It is to allow macromolecule resin liquid by big aperture due to when filled high polymer resin liquid to enclose the larger graphite carbon felt of gap
Flowed in graphite carbon felt, reach each position of graphite carbon felt, small aperture then from big aperture shunting obtain macromolecule
Resin liquid fills up the three-dimensional net structure of graphite carbon felt, while it is fine so that macromolecule resin liquid energy enough reaches each hole
Dimension size be enough to support three-dimensional net structure, when filled high polymer resin liquid will not avalanche, ensure filling after the completion of
Still there is three-dimensional net structure；High phosphorus content is then to ensure the good condition of its electric conductivity.
Preferably, the molecular weight of the macromolecule resin is 400,000~1,000,000.The macromolecule resin of macromolecule can be protected
Demonstrate,prove the good condition of mechanicalness of finished product bipolar plates.
The permeability of bipolar plates high-purity hydrogen at 100MPa is less than 1.0 × 10-6mol/m2s-1Pa-1.Smaller hydrogen
Gas permeability illustrates that the bipolar plates of the present invention have good air-tightness.
The present invention also provides a kind of preparation methods of bipolar plates, include the following steps：
(1) graphite carbon felt pre-processes, and graphite carbon felt is immersed to ultrasonic oscillation in cleaning agent and deionized water successively and is cleaned,
Take out drying for standby；
(2) macromolecule resin is melted or to be dissolved into macromolecule resin liquid spare；
(3) graphite carbon felt of purification is completely immersed in the resin liquid of step (2), the impregnation under room temperature, normal pressure, so
The drying of impregnated graphite carbon felt is taken out afterwards；Finally, the graphite carbon felt of potting resin is placed in mold and is suppressed up to the bipolar plates.
Graphite carbon felt is cleaned and removes impurity, dredges the three-dimensional net structure of graphite carbon felt, goes dipping to clean with macromolecule resin liquid
Graphite carbon felt allows macromolecule resin liquid to be substantially filled in the three-dimensional net structure of graphite carbon felt, fills up all holes, keeps
The integrality of three-dimensional net structure so that finished product still has three-dimensional net structure, ensure that its good electric conductivity, prepares
Method and process is simple, of low cost, is suitable for large-scale production.
Preferably, the preparation process of graphite carbon felt is in the step (1)：Organic resin is formed by electrostatic spinning process
The macromolecule felt with three-dimensional net structure be made by graphitization processing, the organic resin be polyacrylonitrile or poly- second two
Alcohol.The three-dimensional net structure of needs is prepared with electrostatic spinning process by being precisely controlled, which can be according to different need
Adjust the pore size in fiber size, network structure.
Preferably, in the step (1) cleaning agent include a concentration of 30%~60% acetone soln or 20%~
40% hydrochloric acid solution, scavenging period are 10min~40min.Fully wash the organic resin impurity not being graphitized and its
His impurity dredges network structure, and avoids influencing its electric conductivity.
Preferably, macromolecule resin includes polyvinyl resin, polyvinylidene fluoride resin, polyacrylonitrile in the step (2)
Resin and acrylic resin.
Preferably, a concentration of 3.0%~5.5% dimethyl sulphoxide solution or dimethyl are used in the step (2)
Formamide solution dissolves macromolecule resin.
Preferably, the condition of impregnation is in the step (3)：Impregnation 50min~120min under normal temperature and pressure,
Or vacuum degree is maintained under 20MPa~40MPa, impregnation 50min~60min；Drying condition is：At 80 DEG C~180 DEG C
Lower dry 20min~45min；Pressing conditions is：At 140 DEG C~150 DEG C, 5min is suppressed with the pressure of 50KPa~120KPa
~25min.The immersion condition requirement of the present invention is less high, in normal pressure or achievable under vacuum, but graphitic carbon
Thoroughly dipping macromolecule resin liquid needs have accurately control to the time to felt completely, and the time, too short then dipping was incomplete, the time
Long then cost is excessively high.
Using a kind of bipolar plates provided by the present invention and preparation method thereof, there is following technique effect：
1, the present invention proposes a kind of bipolar plates, and the machinery with excellent electron conduction, air-tightness, tension/bending resistance is strong
Degree and corrosion resistance, and manufacturing cost is relatively low, is expected to disclosure satisfy that demand of the large-scale pile to high-performance bipolar plate.
2, the present invention directly utilizes the superior electrical conductivity of graphite carbon felt, as conductive network, by simply impregnating tree
Prepared by the bipolar plates that excellent combination property can be realized in fat material, have preparation process simple, it is easy to accomplish large-scale production.
Specific implementation mode
Principles and features of the present invention are described with reference to embodiments, the given examples are served only to explain the present invention,
It is not intended to limit the scope of the present invention.
Embodiment one：
The macromolecule felt with three-dimensional net structure formed by electrostatic spinning process with polyacrylonitrile is by graphitization
Graphite carbon felt is made in processing, and graphite carbon felt thickness 3.5mm, porosity are 75% or more, selects above-mentioned graphite carbon felt and divides
The polyvinyl resin of son amount about 500,000 is main raw material(s).
Graphite carbon felt is started the cleaning processing successively with 30% aqueous acetone solution and deionized water respectively, graphite cake is complete
It is complete to immerse in solution, it takes out after handling 30min under ultrasonic vibration, is then dried for standby；A certain amount of resin material is placed in
In grinding tool, it is set to melt completely under being heated at 160 DEG C.
Clean graphite carbon felt is completely immersed in the resin liquid of melting, vacuum degree is maintained at 40MPa, impregnation
50min then takes out impregnated graphite carbon felt, the dry 20min at 80 DEG C.Finally, the graphite carbon felt of potting resin is placed in mould
In tool, at 140 DEG C, 5min is suppressed with the pressure of 80KPa, obtains the bipolar plates of the present invention.Wherein resin contains in the bipolar plates
Amount is 10%~16%, remaining is carbon material.
Bipolar plates are tested.
Thickness：1.4mm；
Tensile strength：About 28MPa；
Bending strength：About 25MPa；
Electronic conductivity：Surface conductivity is about 80S/cm, and bulk conductivity is about 70S/cm.
Air-tightness：The permeability of high-purity hydrogen is 1.03 × 10 at 100MPa-9mol/m2s-1Pa-1。
Corrosion resistance：Bipolar plates impregnate 120h in 40% sodium hydroxide solution, and mass loss is about 2.2%.
Embodiment two：
The macromolecule felt with three-dimensional net structure formed by electrostatic spinning process with polyethylene glycol is by graphitization
Graphite carbon felt is made in processing, and graphite carbon felt thickness 6.4mm, porosity are 90% or more, selects above-mentioned graphite carbon felt and divides
The polyvinylidene fluoride resin of son amount about 1,000,000 is main raw material(s).
Graphite carbon felt is started the cleaning processing successively with 20% hydrochloric acid and deionized water respectively, graphite cake is completely immersed in
In solution, takes out after handling 40min under ultrasonic vibration, be then dried for standby.A certain amount of resin material is matched in a reservoir
It is set to a concentration of 5.5% dimethyl sulphoxide solution.
Clean graphite carbon felt is completely immersed in above-mentioned solution, impregnation 120min, then takes under room temperature, normal pressure
Go out impregnated graphite carbon felt, the dry 30min at 160 DEG C.Finally, the graphite carbon felt of potting resin is placed in mold, at 150 DEG C
Under, 20min is suppressed with the pressure of 95KPa, obtains the bipolar plates of the present invention.Resin content is 18.5~26.8% in bipolar plates,
Remaining is carbon material.
Bipolar plates are tested.
Thickness：2.8mm；
Tensile strength：About 44MPa；
Bending strength：About 37MPa；
Electronic conductivity：Surface conductivity is about 110S/cm, and bulk conductivity is about 83S/cm.
Air-tightness：The permeability of high-purity hydrogen is 1.5 × 10 at 100MPa-10mol/m2s-1Pa-1。
Corrosion resistance：Bipolar plates impregnate 120h in 40% sodium hydroxide solution, and mass loss is about 2.0%.
Embodiment three：
The macromolecule felt with three-dimensional net structure formed by electrostatic spinning process with polyethylene glycol is by graphitization
Graphite carbon felt is made in processing, and graphite carbon felt thickness 1.5mm, porosity are 85% or more, selects above-mentioned graphite carbon felt and divides
The polyacrylonitrile resin of son amount about 400,000 is main raw material(s).
Graphite carbon felt is started the cleaning processing successively with 60% acetone and deionized water respectively, graphite cake is completely immersed in
In solution, takes out after handling 10min under ultrasonic vibration, be then dried for standby.A certain amount of resin material is matched in a reservoir
It is set to a concentration of 3.0% dimethyl formamide solution.
Clean graphite carbon felt is completely immersed in above-mentioned solution, at normal temperatures, vacuum degree is impregnation under 20MPa
60min then takes out impregnated graphite carbon felt, the dry 30min at 180 DEG C.Finally, the graphite carbon felt of potting resin is placed in mould
In tool, at 150 DEG C, 25min is suppressed with the pressure of 120KPa, obtains the bipolar plates of the present invention.Resin content is in bipolar plates
12.7~21.4%, remaining is carbon material.
Bipolar plates are tested.
Thickness：0.9mm；
Tensile strength：About 21MPa；
Bending strength：About 18MPa；
Electronic conductivity：Surface conductivity is about 115S/cm, and bulk conductivity is about 104S/cm.
Air-tightness：The permeability of high-purity hydrogen is 1.5 × 10 at 100MPa-7mol/m2s-1Pa-1。
Corrosion resistance：Bipolar plates impregnate 120h in 40% sodium hydroxide solution, and mass loss is about 3.5%.
Example IV：
The macromolecule felt with three-dimensional net structure formed by electrostatic spinning process with polyacrylonitrile is by graphitization
Graphite carbon felt is made in processing, and graphite carbon felt thickness 10.0mm, porosity are 76% or more, selects above-mentioned graphite carbon felt and divides
The acrylic resin of son amount about 800,000 is main raw material(s).
Graphite carbon felt is started the cleaning processing successively with 40% hydrochloric acid and deionized water respectively, graphite cake is completely immersed in
In solution, takes out after handling 10min under ultrasonic vibration, be then dried for standby.A certain amount of resin material is placed in mold,
It is processed into solution at 180 DEG C.
Clean graphite carbon felt is completely immersed in above-mentioned solution, impregnation 50min, then takes under room temperature, normal pressure
Go out impregnated graphite carbon felt, the dry 45min at 120 DEG C.Finally, the graphite carbon felt of potting resin is placed in mold, at 140 DEG C
Under, 10min is suppressed with the pressure of 50KPa, obtains the bipolar plates that the present invention designs.In bipolar plates resin content be 33~
46.6%, remaining is carbon material.
Bipolar plates are tested.
Thickness：6.3mm；
Tensile strength：About 52MPa；
Bending strength：About 47MPa；
Electronic conductivity：Surface conductivity is about 108S/cm, and bulk conductivity is about 113S/cm.
Air-tightness：The permeability of high-purity hydrogen is 1.2 × 10 at 100MPa-10mol/m2s-1Pa-1。
Corrosion resistance：Bipolar plates impregnate 120h in 40% sodium hydroxide solution, and mass loss is about 2.5%.
Embodiment five：
The macromolecule felt with three-dimensional net structure formed by electrostatic spinning process with polyacrylonitrile is by graphitization
Graphite carbon felt is made in processing, and graphite carbon felt thickness 4.3mm, porosity are 80% or more, selects above-mentioned graphite carbon felt and divides
The polyvinylidene fluoride resin of son amount about 1,000,000 is main raw material(s).
Graphite carbon felt is started the cleaning processing successively with 20% hydrochloric acid and deionized water respectively, graphite cake is completely immersed in
In solution, takes out after handling 40min under ultrasonic vibration, be then dried for standby.A certain amount of resin material is matched in a reservoir
It is set to a concentration of 3.0% dimethyl sulphoxide solution.
Clean graphite carbon felt is completely immersed in above-mentioned solution, at normal temperatures, vacuum degree is impregnation under 40MPa
50min then takes out impregnated graphite carbon felt, the dry 40min at 160 DEG C.Finally, the graphite carbon felt of potting resin is placed in mould
In tool, at 140 DEG C, 25min is suppressed with the pressure of 50KPa, obtains the bipolar plates of the present invention.Resin content is in bipolar plates
16.2~26.9%, remaining is carbon material.
Bipolar plates are tested.
Thickness：1.2mm；
Tensile strength：About 49MPa；
Bending strength：About 46MPa；
Electronic conductivity：Surface conductivity is about 113S/cm, and bulk conductivity is about 96S/cm.
Air-tightness：The permeability of high-purity hydrogen is 1.3 × 10 at 100MPa-10mol/m2s-1Pa-1。
Corrosion resistance：Bipolar plates impregnate 120h in 40% sodium hydroxide solution, and mass loss is about 2.1%.
Embodiment six：
The macromolecule felt with three-dimensional net structure formed by electrostatic spinning process with polyethylene glycol is by graphitization
Graphite carbon felt is made in processing, and graphite carbon felt thickness 5.3mm, porosity are 60% or more, selects above-mentioned graphite carbon felt and divides
The polyacrylonitrile resin of son amount about 400,000 is main raw material(s).
Graphite carbon felt is started the cleaning processing successively with 30% acetone and deionized water respectively, graphite cake is completely immersed in
In solution, takes out after handling 30min under ultrasonic vibration, be then dried for standby.A certain amount of resin material is matched in a reservoir
It is set to a concentration of 5.5% dimethyl formamide solution.
Clean graphite carbon felt is completely immersed in above-mentioned solution, impregnation 120min, then takes under room temperature, normal pressure
Go out impregnated graphite carbon felt, the dry 45min at 80 DEG C.Finally, the graphite carbon felt of potting resin is placed in mold, at 150 DEG C
Under, 5min is suppressed with the pressure of 120KPa, obtains the bipolar plates that the present invention designs.In bipolar plates resin content be 47.8~
60%, remaining is carbon material.
Bipolar plates are tested.
Thickness：1.6mm；
Tensile strength：About 32MPa；
Bending strength：About 24MPa；
Electronic conductivity：Surface conductivity is about 121S/cm, and bulk conductivity is about 108S/cm.
Air-tightness：The permeability of high-purity hydrogen is 2.6 × 10 at 100MPa-7mol/m2s-1Pa-1。
Corrosion resistance：Bipolar plates impregnate 120h in 40% sodium hydroxide solution, and mass loss is about 2.8%.
The test effect to bipolar plates of integrated embodiment 1~6, a kind of bipolar plates provided by the invention have excellent electricity
Subconductivity, air-tightness, tension/bending resistance mechanical strength and corrosion resistance, production method is simple, of low cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of protection of the invention god.
Claims (10)
1. a kind of bipolar plates, which is characterized in that the bipolar plates include the graphite carbon felt for having three-dimensional net structure, and filling
Macromolecule resin in the graphite carbon felt three-dimensional net structure, the mass content of graphite carbon felt described in the bipolar plates
It is 40%~90%, the mass ratio of the resin material is 10%~60%.
2. bipolar plates according to claim 1, which is characterized in that the graphite carbon felt porosity is 60%~95%, thick
It is 1.5mm~10mm to spend, and carbon content is 80% or more in graphite carbon felt.
3. bipolar plates according to claim 1, which is characterized in that the molecular weight of the macromolecule resin is 400,000~100
Ten thousand.
4. preparation method according to claim 1, which is characterized in that bipolar plates high-purity hydrogen at the 100MPa oozes
Saturating rate is less than 1.0 × 10-6mol/m2s-1Pa-1。
5. a kind of preparation method of bipolar plates, which is characterized in that include the following steps：
(1) graphite carbon felt pre-processes, and graphite carbon felt is immersed to ultrasonic oscillation in cleaning agent and deionized water successively and is cleaned, is taken out
Drying for standby；
(2) macromolecule resin is melted or to be dissolved into macromolecule resin liquid spare；
(3) graphite carbon felt of purification is completely immersed in the resin liquid of step (2), impregnation, then takes out impregnated graphite carbon
Felt is dried；Finally, the graphite carbon felt of potting resin is placed in mold and suppresses the bipolar plates to obtain the final product, institute in the bipolar plates
The mass content for stating graphite carbon felt is 40%~90%, and the mass ratio of the resin material is 10%~60%.
6. preparation method according to claim 5, which is characterized in that the preparation process of graphite carbon felt in the step (1)
For：Organic resin is made by the macromolecule felt with three-dimensional net structure that spinning technique is formed by graphitization processing, institute
It is polyacrylonitrile or polyethylene glycol to state organic resin.
7. preparation method according to claim 5, which is characterized in that cleaning agent includes a concentration of in the step (1)
30%~60% acetone soln or 20%~40% hydrochloric acid solution, scavenging period are 10min~40min.
8. preparation method according to claim 5, which is characterized in that macromolecule resin includes poly- second in the step (2)
Olefine resin, polyvinylidene fluoride resin, polyacrylonitrile resin and acrylic resin.
9. preparation method according to claim 5, which is characterized in that in the step (2) using a concentration of 3.0%~
5.5% dimethyl sulphoxide solution or dimethyl formamide solution dissolves macromolecule resin.
10. preparation method according to claim 5, which is characterized in that the condition of impregnation is in the step (3)：
Impregnation 50min~120min or vacuum degree are maintained under 20MPa~40MPa under normal temperature and pressure, impregnation 50min
~60min；Drying condition is：Dry 20min~45min at 80 DEG C~180 DEG C；Pressing conditions is：At 140 DEG C~150 DEG C
Under, 5min~25min is suppressed with the pressure of 50KPa~120KPa.
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| CN109585871A (en) * | 2018-10-30 | 2019-04-05 | 东莞理工学院 | Graphene-based bipolar plate and preparation method thereof |
| CN109786778A (en) * | 2019-01-28 | 2019-05-21 | 威海南海碳材料科技研究院有限公司 | A kind of composite dual-electrode plates used for all-vanadium redox flow battery and preparation method thereof |
| CN110993981A (en) * | 2019-12-17 | 2020-04-10 | 上海大学 | Method for preparing ultrathin carbon/carbon composite bipolar plate |
| CN113013432A (en) * | 2019-12-20 | 2021-06-22 | 上海神力科技有限公司 | Method for preparing graphite bipolar plate |
| CN113410486A (en) * | 2021-06-03 | 2021-09-17 | 大连海事大学 | Flow battery bipolar plate material and preparation method thereof |
| CN114824344A (en) * | 2022-04-18 | 2022-07-29 | 冠驰新能科技(南京)有限公司 | Graphite-resin composite bipolar plate and preparation method and application thereof |
| CN114864983A (en) * | 2022-01-27 | 2022-08-05 | 上海神力科技有限公司 | Flexible graphite polar plate for fuel cell and preparation method and application thereof |
| CN115548363A (en) * | 2022-11-29 | 2022-12-30 | 山东海化集团有限公司 | Weldable bipolar plate for flow battery and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109585871A (en) * | 2018-10-30 | 2019-04-05 | 东莞理工学院 | Graphene-based bipolar plate and preparation method thereof |
| CN109786778A (en) * | 2019-01-28 | 2019-05-21 | 威海南海碳材料科技研究院有限公司 | A kind of composite dual-electrode plates used for all-vanadium redox flow battery and preparation method thereof |
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| CN113410486A (en) * | 2021-06-03 | 2021-09-17 | 大连海事大学 | Flow battery bipolar plate material and preparation method thereof |
| CN114864983A (en) * | 2022-01-27 | 2022-08-05 | 上海神力科技有限公司 | Flexible graphite polar plate for fuel cell and preparation method and application thereof |
| CN114824344A (en) * | 2022-04-18 | 2022-07-29 | 冠驰新能科技(南京)有限公司 | Graphite-resin composite bipolar plate and preparation method and application thereof |
| CN114824344B (en) * | 2022-04-18 | 2024-01-19 | 冠驰新能科技(南京)有限公司 | Graphite-resin composite bipolar plate and preparation method and application thereof |
| CN115548363A (en) * | 2022-11-29 | 2022-12-30 | 山东海化集团有限公司 | Weldable bipolar plate for flow battery and preparation method and application thereof |
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Application publication date: 20180928 |